Sahih Bukhari Volume 9, Book 87, Hadith 6899

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ سُفْيَانَ، حَدَّثَنَا مُوسَى بْنُ أَبِي عَائِشَةَ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ، قَالَ قَالَتْ عَائِشَةُ لَدَدْنَا رَسُولَ اللَّهِ صلى الله عليه وسلم فِي مَرَضِهِ، وَجَعَلَ يُشِيرُ إِلَيْنَا ‏"‏ لاَ تَلُدُّونِي ‏"‏‏.‏ قَالَ فَقُلْنَا كَرَاهِيَةُ الْمَرِيضِ بِالدَّوَاءِ، فَلَمَّا أَفَاقَ قَالَ ‏"‏ أَلَمْ أَنْهَكُمْ أَنْ تَلُدُّونِي ‏"‏‏.‏ قَالَ قُلْنَا كَرَاهِيَةٌ لِلدَّوَاءِ‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ لاَ يَبْقَى مِنْكُمْ أَحَدٌ إِلاَّ لُدَّ ـ وَأَنَا أَنْظُرُ ـ إِلاَّ الْعَبَّاسَ فَإِنَّهُ لَمْ يَشْهَدْكُمْ ‏"‏‏.

Narrated By 'Aisha : We poured medicine into the mouth of Allah's Apostle during his illness, and he pointed out to us intending to say, "Don't pour medicine into my mouth." We thought that his refusal was out of the aversion a patient usually has for medicine. When he improved and felt a bit better he said (to us.) "Didn't I forbid you to pour medicine into my mouth?" We said, "We thought (you did so) because of the aversion, one usually have for medicine." Allah's Apostle said, "There is none of you but will be forced to drink medicine, and I will watch you, except Al-'Abbas, for he did not witness this act of yours."